diff --git a/flake.nix b/flake.nix
index 3702898..c78ba21 100644
--- a/flake.nix
+++ b/flake.nix
@@ -127,7 +127,7 @@
         matbook = darwinSystem {
           system = "aarch64-darwin";
           modules = nixDarwinCommonModules ++ [
-            {
+            ({ pkgs, ... }: {
               users.primaryUser = "mat";
               networking.computerName = "matbook pro m1";
               networking.hostName = "matbook";
@@ -137,19 +137,28 @@
               nix.buildCores = 2;
               nix.maxJobs = 4;
 
+              environment.systemPackages = with pkgs; [
+                vscodium
+              ];
               games.enable = true;
               home-manager.sharedModules = [{
                 programs.git.userEmail = "mat@mat.services";
                 programs.git.userName = "mat ess";
+                programs.ssh.matchBlocks.remarkable = {
+                  hostname = "10.11.99.1";
+                  user = "root";
+                  port = 22;
+                };
+                programs.vscode.package = pkgs.vscodium;
               }];
-            }
+            })
           ];
         };
 
         yelpbook-m1 = darwinSystem {
           system = "aarch64-darwin";
           modules = nixDarwinCommonModules ++ [
-            {
+            ({ pkgs, ... }: {
               users.primaryUser = "mess";
               networking.knownNetworkServices = [
                 "Wi-Fi"
@@ -158,11 +167,24 @@
               nix.maxJobs = 5;
 
               games.enable = false;
+              environment.systemPackages = with pkgs; [
+                yubiswitch
+                vscode
+              ];
+              homebrew.casks = [ "itsycal" ];
               home-manager.sharedModules = [{
                 programs.git.userEmail = "mess@yelp.com";
                 programs.git.userName = "Matthew Ess";
+                programs.ssh.matchBlocks.devbox = {
+                  hostname = "amp1";
+                  forwardAgent = true;
+                  serverAliveInterval = 120;
+                };
+                programs.fish.functions.devbox.body = ''
+                  ssh -t devbox "agenttmux attach; or agenttmux new -s yelp"
+                '';
               }];
-            }
+            })
           ];
         };
 
diff --git a/home/copyApplications.nix b/home/copyApplications.nix
index 3f503da..bf0e75f 100644
--- a/home/copyApplications.nix
+++ b/home/copyApplications.nix
@@ -14,6 +14,7 @@
         baseDir="$HOME/Applications/Home Manager Apps"
         rsyncArgs="--archive --checksum --chmod=-w --copy-unsafe-links --delete"
         $DRY_RUN_CMD mkdir -p "$baseDir"
+        $DRY_RUN_CMD sudo rm -rf "$baseDir"/*
         $DRY_RUN_CMD sudo ${pkgs.rsync}/bin/rsync ''${VERBOSE_ARG:+-v} $rsyncArgs "$appsSrc" "$baseDir"
       fi
     '';
diff --git a/home/default.nix b/home/default.nix
index a92ca21..ab054a9 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -67,19 +67,13 @@
       matchBlocks."*".extraOptions = {
         UseKeychain = "yes";
         AddKeysToAgent = "yes";
-        # IdentityFile = "~/.ssh/id_ed25519";
+        # TODO: gate this behind a check if the cask is present
         IdentityAgent = "~/Library/Containers/com.maxgoedjen.Secretive.SecretAgent/Data/socket.ssh";
       };
-      matchBlocks.remarkable = {
-        hostname = "10.11.99.1";
-        user = "root";
-        port = 22;
-      };
     };
     # vscode
-    vscode = with pkgs; {
+    vscode = {
       enable = true;
-      package = vscodium;
       # extensions = [ pijul-vscode ];
     };
   };
diff --git a/pkgs/default.nix b/pkgs/default.nix
index c3a6f94..72bbd55 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -9,6 +9,7 @@ let
     "luar"
     "smarttab-kak"
     "kakoune-sudo-write"
+    "yubiswitch"
   ];
 in
 genAttrs pkgs buildPkg
diff --git a/pkgs/yubiswitch.nix b/pkgs/yubiswitch.nix
new file mode 100644
index 0000000..a450575
--- /dev/null
+++ b/pkgs/yubiswitch.nix
@@ -0,0 +1,22 @@
+{ stdenv, lib, fetchurl, undmg, unzip, version ? "0.12", ... }:
+
+stdenv.mkDerivation {
+  inherit version;
+  pname = "yubiswitch";
+  nativeBuildInputs = [ undmg unzip ];
+  src = fetchurl {
+    url = "https://github.com/pallotron/yubiswitch/releases/download/v${version}/yubiswitch_${version}.dmg";
+    sha256 = "aR/3AXwAAhFYchfGCmqfNSs8uNnuLOCZ8B0JbXlKAf8=";
+  };
+
+  sourceRoot = ".";
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/Applications
+    cp -r yubiswitch.app $out/Applications/yubiswitch.app
+
+    runHook postInstall
+  '';
+}